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SUMMARY:Fluxes and charges in de Sitter - Prof. Marika Taylor\, University
  of Southampton 
DTSTART:20220223T141500Z
DTEND:20220223T151500Z
UID:TALK169613@talks.cam.ac.uk
CONTACT:Bipasha Chakraborty
DESCRIPTION:In this talk we will discuss the definition of conserved quant
 ities in asymptotically locally de Sitter spacetimes. One may define an an
 alogue of holographic charges both at future and past infinity and at othe
 r Cauchy surfaces\, as integrals over the intersection of timelike surface
 s C and these Cauchy surfaces. In general these charges depend on the choi
 ce of timelike surface C but if gravitational flux is absent the charges a
 re conserved quantities\, independent of the choice of timelike surface. I
 f there is net gravitational flux entering or leaving the spacetime region
  bounded by two timelike surfaces and two Cauchy surfaces\, this may be ch
 aracterised in terms of a corresponding change in charge. We illustrate th
 ese discussions using examples such as Kerr de Sitter black holes and Kerr
  Robinson-Trautmann solutions. \n
LOCATION:ONLINE - Details to be sent by email
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